OFFSET
1,1
LINKS
Robert Israel, Table of n, a(n) for n = 1..2035
EXAMPLE
For n=3 p=5 is the least prime that 6^3-p is prime (211).
MAPLE
f:= proc(n) local t, p;
t:= 6^n;
p:= 2;
do
p:= nextprime(p);
until isprime(t-p);
p
end proc:
map(f, [$1..100]); # Robert Israel, Nov 05 2020
MATHEMATICA
f[n_] := Block[{p = 2}, While[! PrimeQ[6^n - p], p = NextPrime[p]];
p]; Array[f, 60]
PROG
(PARI) a(n) = my(p = 2); while(!isprime(6^n-p), p = nextprime(p+1)); p; \\ Michel Marcus, Mar 23 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Mateusz Szymański, Apr 21 2012
STATUS
approved